Class / Patent application number | Description | Number of patent applications / Date published |
173128000 | Impact transmitting anvil | 23 |
20080217039 | Hand-held power tool with a pneumatic percussion mechanism - A hand-held percussion power tool includes a pneumatic mechanism ( | 09-11-2008 |
20080283260 | Hand-held power tool having lubricated percussion mechanism - A hand-held power tool a percussion mechanism ( | 11-20-2008 |
20090000799 | Automatic Drop Hammer - A drop-hammer apparatus that can repeatedly lift and release a weighted hammer over a specified vertical distance by using a gear with teeth along less than its entire perimeter. | 01-01-2009 |
20090229844 | Hammer Having a Two Part Body - A tool assembly such as a hammer assembly, includes a housing defining a chamber and a reciprocating piston arranged in the chamber for cyclical movement in a work stroke and a return stroke. The housing includes a lower housing member, an upper housing member and an engaging structure which permits the engagement of the upper housing member with the lower housing member by relative rotation of the upper and lower housing members, such that each of the lower and upper housing members defines a portion of the chamber. The upper housing member is a precision component which contains the hydraulic components or other drive components necessary to drive the piston, while the lower housing member can be manufactured separately since it does not need to be manufactured to the high tolerances required by the upper housing member. The resulting tool assembly may be more compact than a conventional tie rod tool assembly. | 09-17-2009 |
20090308627 | Percussion device and rock drilling machine - A percussion device ( | 12-17-2009 |
20100206593 | Striking mechanism and hand-held power tool - A striking mechanism includes a working space whose first section is surrounded by a first electromagnet and whose second section is surrounded by a second electromagnet; a striking element that can move along a striking axis inside the working space and that has a magnetizable material; an anvil whose striking surface delimits the working space in the striking direction and which protrudes into the first magnetic coil and which is made of a magnetically soft material. A spring element is provided which exerts a force onto the striking element in every position in the working space in the direction of the anvil. | 08-19-2010 |
20100236803 | Driving cap for wooden stakes - This apparatus is a steel driving cap for forcibly driving wooden stakes into the ground utilizing a sledgehammer for striking the driving cap. The apparatus is constructed of tubular steel of various dimensions to accommodate various sizes of wood stakes. The apparatus also has a flat steel surface of various thickness (depending on the size of the wood stake) welded to the top of the apparatus to form a cap, used for striking with a hammer or sledgehammer. The apparatus also has a steel handle welded to the back side of the apparatus, used by a second person for guiding the stake as it is being driven. | 09-23-2010 |
20110198104 | Stake driver - A stake driver for driving wood stakes into a soil has a rectangular hollow housing having an open top and an open bottom. The bottom portion is configured for receiving at least a part of the wood stake therein, while an elongated driving shaft extends from an interior of the housing upwardly above a top edge of the housing. The upper part of the driving shaft is configured for engagement by a power transmitting tool, such as for instance a jack hammer. A driving pad is secured to a bottom end of the driving shaft transversely to the longitudinal axis of the housing. At least one hammer plate is secured, through connection to a shaft sleeve, to the driving shaft above the driving pad. The hammer plate and the driving pad are each configured to move in an axial direction inside the housing and transmit a hammering force to the wood stake. The hammering force is partially absorbed by a compression spring positioned between the hammer plate and the driving pad. | 08-18-2011 |
20110308829 | NAIL GUN - A nail gun includes a motor and a driving mechanism that are optimally arranged to achieve continuous and efficient hammering within a compact structure. In one embodiment, the nail gun includes a chassis comprising a handle and a muzzle; a cylinder within an upper part of the chassis; a piston within the cylinder; an anvil within the muzzle; a motor within the handle; a rotation-linear motion conversion mechanism comprising a pendulum bearing for connecting the piston and the motor and converting a rotation of the motor into a linear motion of the piston; wherein the piston is configured to drive the air hammer to impact the nail continuously through the pin. | 12-22-2011 |
20140116739 | ROTARY HAMMER - A rotary hammer includes a motor, a spindle coupled to the motor for receiving torque from the motor, a piston at least partially received within the spindle for reciprocation therein, a striker received within the spindle for reciprocation in response to reciprocation of the piston, and an anvil received within the spindle and positioned between the striker and a tool bit. The rotary hammer also includes a retainer received within the spindle for selectively securing the striker in an idle position in which it is inhibited from reciprocating within the spindle, and an O-ring positioned between the retainer and the spindle. The O-ring is disposed around an outer peripheral surface of the anvil. The O-ring is compressible in response to the striker assuming the idle position. The compressed O-ring imparts a frictional force on the outer peripheral surface of the anvil to decelerate the anvil. | 05-01-2014 |
20150053449 | QUICK CHANGE RAIL FASTENER DRIVING WORKHEAD UNIT - A fastener driving workhead unit is provided for performing an operation on spikes of a railroad track having a plurality of ties, and includes a hammer housing configured for accommodating a hammer, the housing being attached to a hammer bushing having a hammer bushing clamp. Also included in the workhead unit is an anvil assembly having an anvil and an extension coupler, the extension coupler being releasably secured to the hammer bushing by fastening the hammer bushing clamp. Further, the workhead unit includes a jaw assembly having a jaw block, the jaw block having at least one jaw block clamp for releasably securing a guide rod to the jaw block by the jaw block clamp, such that the anvil freely reciprocates in the hammer housing for driving the spikes into the plurality of ties. | 02-26-2015 |
20160067856 | IMPACT TOOL - It is an object of the invention to provide an impact tool having a rational mechanism in an idling state. According to the representative invention, in an idling state defined as a state in which a tool accessory | 03-10-2016 |
20160158819 | Compact Pneumatic Auto Body Hammer with Fine Control of Impact Force - A hand-held pneumatic impact tool for striking and planishing metal panels includes a monostable, reciprocating impact mechanism in a small form factor, with an air pressure regulator to control striking force and interchangeable toolheads to apply the force as necessary to repair dented or crumpled vehicle bodies. | 06-09-2016 |
20160250739 | LOW-NOISE HYDRAULIC HAMMER | 09-01-2016 |
173131000 | Formed of plural transmitting part or separate layers | 1 |
20090032276 | Hand-held power tool - A hand-held power tool includes two vibration-damped handles ( | 02-05-2009 |
173132000 | With means to directly connect anvil to tool | 5 |
20080314608 | Linearly Driven and Air-Cooled Boring and/or Percussion Hammer - A boring and/or percussion hammer comprises an electrodynamic linear drive and a pneumatically damped percussion mechanism which is provided with a drive piston driven by the linear drive during the reciprocating movement thereof, an impact piston and a pneumatic spring arranged between the drive and impact pistons. An air-supply device comprises a pumping element, which is linearly forth and back movable for generating airflow. The pumping element is connected to the drive piston in such a way that the movement thereof is transmitted to said pumping element, thereby the cooling air is transported by an air channel for cooling heat generated elements. | 12-25-2008 |
20090071669 | Tool retention apparatus and method - A tool assembly provided with a housing defining a chamber, and a reciprocating work tool arranged in the chamber, is disclosed. A tool retention member has an aperture through which the work tool extends. Engaging structure including mutually engaging protrusions on the housing and the tool retention member is configured to permit engagement of the tool retention member with the housing by relative rotation of the tool retention member and the housing. Retention structure on the work tool is configured to prevent removal of the work tool from the housing when the tool retention member is engaged with the housing. A locking structure is configured to lock the tool retention member and housing against relative rotation. A prestressing structure is located between the protrusions on the housing and a portion of the tool retention member and is configured to urge the tool retention member away from the housing. | 03-19-2009 |
20090133890 | Power Tool Attachments - An attachment is for a power tool having a chuck. The attachment has a connection portion in the form of a shaft for connecting the attachment with the tool, during use, by attachment in the chuck. The attachment further has a blade portion which, in use, is offered to a surface indicated at, and to which hammer blows are transmitted from the hammer tool, thereby causing the blade portion to cut into the surface. | 05-28-2009 |
20120199372 | IMPACT TOOL - According to an aspect of the present invention, there is provided an impact tool including: a motor; a hammer connected to an output portion of the motor; and an anvil to be struck by the hammer in a rotation direction and having a rotary shaft, the hammer striking the anvil in the rotation direction by driving the motor in pulses, wherein the anvil is provided in front of the hammer, wherein the hammer is driven in pulses by the motor, and wherein a rotation angle of the hammer is substantially proportional to a rotation angle of the motor. | 08-09-2012 |
20150336255 | CONNECTING ROD FOR AN IMPACT MEMBER OF AN IMPACT TOOL - A connecting rod for an impact member of an impact tool is provided. The impact member comprises axially opposing impacting portion and connecting portion and a radial flange locating between the impacting portion and the connecting portion. The radial flange includes a first abutting surface facing the connecting portion. The impact member is insertable into the impact tool and detachably assembled through blocking the radial flange by the impact tool. The connecting rod includes a rod body. The rod body includes receiving end surface and impacting end surface, and a holding portion between the receiving end surface and the impacting end surface. The receiving end surface is recessed to form an assembling slot. The assembling slot includes a second abutting surface disposed circumferentially. When the connecting portion is inserted in the assembling slot, the first abutting surface abuts against the second abutting surface. | 11-26-2015 |
173133000 | Anvil retained for limited movement | 3 |
20110259621 | Slide Hammer Stake Driver - The present invention comprises a steel outer tubular sleeve cooperating with an inner steel rod that is dimensioned to slide relative to the outer sleeve. In a first embodiment, a steel slug is welded in the sleeve at its upper end and designed to strike an upper end of the inner steel rod. In an alternative embodiment, the steel slug is welded in the sleeve at its lower end and designed to be struck by the lower end of the inner steel rod. Completing the assembly is an attachment member that in the first embodiment is removably attached to the lower end of the inner steel rod and that in the alternative embodiment is removably attached to the lower end of the outer tubular member. The attachment member is designed to hold a stake of a given cross-sectional dimension. | 10-27-2011 |
20130025895 | HAMMER - A hammer mechanism including: a motor; a piston reciprocatingly driven by the motor; a ram reciprocatingly driven by the reciprocating piston via an air spring; a beat piece supported in an axially slideable manner within a beat piece support structure which, during the normal operation of the hammer mechanism, is repetitively struck by the ram and which transfers the impacts to a cutting tool when held by the tool holder; wherein the beat piece comprises a first impact surface and the beat piece support structure including a second impact surface, the first and second impact surfaces coming into contact with each other when the beat piece axially slides to its furthest position away from the ram; and wherein the shape of the two surfaces relative to each other is arranged so that there is a non-uniform amount of contact between the first and second surfaces around the longitudinal axis. | 01-31-2013 |
20140262399 | PNEUMATIC POST DRIVER - A pneumatic post driving apparatus comprises an internal cylinder chamber within which a hammer piston is reciprocated. The hammer piston strikes against an anvil, which in use is abutted against the top of a post to be driven. Kinetic energy from the descending hammer piston is transferred through the anvil into driving energy for the post. An air control system alternately routes pressurized air between the top and bottom ends of the cylinder to move the hammer piston up and down. The air control system includes a spool-type control valve disposed for sliding movement within a control body. The anvil is resiliently suspended at the bottom of the cylinder chamber by an annular retention flange that has a conically tapered under surface. A lower elastomeric pad fits against the tapered under surface of the retention flange in direct surface-to-surface contact. | 09-18-2014 |